title: Optical characterization of Eu3+ and Tb3+ ions doped cadmium lithium alumino fluoro boro tellurite glasses.
abstract: This article reports on the development and spectral results of Eu(3+) and Tb(3+) ions doped cadmium lithium alumino fluoro boro tellurite (CLiAFBT) glasses in the following composition. 40TeO2-30B2O3-10CdO-10Li2O-10AlF3 (Hostglass) (40-x)TeO2-30B2O3-10CdO-10Li2O-10AlF3-xEu2O3 (40-x)TeO2-30B2O3-10CdO-10Li2O-10AlF3-xTb4O7 where x=0.25, 0.50, 0.75, 1.0, 1.25 mol%. Glass amorphous nature and thermal properties have been studied using the XRD and DSC profiles. From the emission spectra of Eu(3+):glasses, five emission transitions have been observed at 578 nm, 592 nm, 612 nm, 653 nm, 701 nm and are assigned to the transitions (5)D(0)→(7)F(0), (7)F(1,)(7)F(2), (7)F(3) and (7)F(4), respectively, with λ(exci)=392 nm ((7)F(0)→(5)L(6)). In case of Tb(3+):glasses, four emission transitions ((5)D(4)→(7)F(6,)(7)F(5), (7)F(4) and (7)F(3)) are observed at 488 nm, 543 nm, 584 nm and 614 nm, respectively, with λ(exci)=376 nm. Decay curves and energy level diagrams have been plotted to evaluate the life times and to analyze the emission mechanism.
authors.affiliation: Department of Physics, S V Degree College, Kadapa, India.
authors.forename: K Vemasevana
authors.initials: KV
authors.lastname: Raju
authors.forename: S
authors.initials: S
authors.lastname: Sailaja
authors.forename: C Nageswara
authors.initials: CN
authors.lastname: Raju
authors.forename: B Sudhakar
authors.initials: BS
authors.lastname: Reddy
mesh_terms: D000535:Aluminum / Q000737:chemistry; D001895:Boron / Q000737:chemistry; D002104:Cadmium / Q000737:chemistry*; D002152:Calorimetry, Differential Scanning; D005063:Europium / Q000737:chemistry*; D005461:Fluorine / Q000737:chemistry; D005898:Glass / Q000737:chemistry*; D007477:Ions; D008094:Lithium / Q000737:chemistry*; D055620:Optical Phenomena; D017785:Photons; D013056:Spectrophotometry, Ultraviolet; D013691:Tellurium / Q000737:chemistry*; D013725:Terbium / Q000737:chemistry*; D013816:Thermodynamics; D014961:X-Ray Diffraction
chemical_list: D007477:Ions; D002104:Cadmium; D013725:Terbium; D005461:Fluorine; D005063:Europium; D008094:Lithium; D000535:Aluminum; C026660:tellurous acid; D001895:Boron; D013691:Tellurium